XXI. Perikles, however, restrained these outbursts, and would not allow the people to meddle with foreign states, but used the power of Athens chiefly to preserve and guard her already existing empire, thinking it to be of paramount importance to oppose the Lacedaemonians, a task to which he bent all his energies, as is proved by many of his acts, especially in connection with the Sacred War. In this war the Lacedaemonians sent a force to Delphi, and made the Phokaeans, who held it, give it up to the people of Delphi: but as soon as they were gone Perikles made an expedition into the country, and restored the temple to the Phokaeans; and as the Lacedaemonians had scratched the oracle which the Delphians had given them, on the forehead of the brazen wolf there, Perikles got a response from the oracle for the Athenians, and carved it on the right side of the same wolf. XXII. Events proved that Perikles was right in confining the Athenian empire to Greece. First of all Euboea revolted, and he was obliged to lead an army to subdue that island. Shortly after this, news came that the Megarians had become hostile, and that an army, under the command of Pleistoanax, king of the Lacedaemonians, was menacing the frontier of Attica. Perikles now in all haste withdrew his troops from Euboea, to meet the invader. He did not venture on an engagement with the numerous and warlike forces of the enemy, although repeatedly invited by them to fight: but, observing that Pleistoanax was a very young man, and entirely under the influence of Kleandrides, whom the Ephors had sent to act as his tutor and counsellor because of his tender years, he opened secret negotiations with the latter, who at once, for a bribe, agreed to withdraw the Peloponnesians from Attica. When their army returned and dispersed, the Lacedaemonians were so incensed that they imposed a fine on their king, and condemned Kleandrides, who fled the country, to be put to death. This Kleandrides was the father of Gylippus, who caused the ruin of the Athenian expedition in Sicily. Avarice seems to have been hereditary in the family, for Gylippus himself, after brilliant exploits in war, was convicted of taking bribes, and banished from Sparta in disgrace. This is more fully set forth in the Life of Lysander.